Canada Blower Square Fans incorporate non-overloading BI impeller desings: the motor can be sized for the operating horsepower of the fan and not oversized, thus increasing motor efficiency. Heavy gauge spinning inlet with airflow diverter permits smooth air flow and close wheel tolerances.

Three different wheel designs on CB SQB Square Fans provide the widest choice in applications suitability, efficiency, sound, and cost. All of them feature the backward inlcinged non overloading horsepower chracteristic, where the horse power curve reaches a peak and then decreases even as air flow increases. This feature allows maximum brake horsepower calculation and motor selection that prevents electrical system overloading even if system pressure changes.

True aerodynamic airfoil blade shape allows stable operation from wide open to closed off; ideal for clean iar applications such as building ventilation with variable air volume system control or clean industrial gas handling. Aerodynamic single surface blade shape of backward curve wheel offers alternative selction points to the Airfoil wheel and also provides stable operation from wide open to closed-off. Flat, single thickness backwardly inlined plades are suited for applications from clean air to those where dust and limited material is present in the airstream and where airfoil shapes are not recommended due to material build up that closes unbalance and vibration.